I was going to get some acrylic material and make my own, but decided the effort really wasn't worth it after just using the 2 plastic strap holders. it held my battery just fine and if you measure/install the plastic pieces correctly, they fit the small indents in the bottom of the battery box and give you a guide to get them set in correctly..

at the end of the day, I decided that with them installed in the passenger cubby out of the way and buried behind towels/purses/etc, those frames were more cosmetic than functional and no one would see them anyway